My mobile phone is the first generation of Xiaomi. I sent two short messages yesterday morning, and I couldn't send them out. The phone bill is sufficient, and other systems can work normally but cann

My mobile phone is the first generation of Xiaomi. I sent two short messages yesterday morning, and I couldn't send them out. The phone bill is sufficient, and other systems can work normally but cannot be sent out. ... It is recommended that you check the following steps for troubleshooting.

1 It is recommended that you click SMS-Menu-Settings-Advanced Settings-SMS Center Number to reset.

I suggest you try to call a friend to see if you owe money.

I suggest you try to see if other cards plugged into Xiaomi's mobile phone can be used normally.

If it still can't be solved, please back up the data and enter the recovery to clear the cache, user data and all data. After entering the system, the data will not be recovered temporarily, and try to send SMS directly.

If it still can't be solved, it is recommended to back up the data and try the latest development version.